How many consumers want to pay the extra cost for implementation of a system like this? Before using any tool you should understand the proper operation of that tool, which includes proper safety precautions. If I cut my finger off using a power tool I suspect I will be at fault for ignoring and/or shortcutting safety procedures (guards around cutters/blades, push sticks, feather boards, anti-kickback devices ... etc ...).
How does that joke go ??
What is the difference between a Lawyer and a Catfish ?
